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Anyonic Statistics Revealed by the Hong-Ou-Mandel Dip for Fractional Excitations
T Jonckheere1, J Rech1, B Grémaud1
1Aix Marseille Univ, Université de Toulon, CNRS, CPT, Marseille, France.
Physical Review Letters
|May 19, 2023
Summary
Researchers demonstrate that Hong-Ou-Mandel (HOM) interference in fractional quantum Hall effect (FQHE) systems directly reveals anyonic statistics. The HOM dip
Area of Science:
- Condensed Matter Physics
- Quantum Information Science
- Mesoscopic Physics
Background:
- The fractional quantum Hall effect (FQHE) is a quantum mechanical phenomenon observed in 2D electron systems subjected to strong magnetic fields at low temperatures.
- FQHE systems are known to host exotic quasiparticles called anyons, which exhibit statistics intermediate between bosons and fermions.
Purpose of the Study:
- To experimentally demonstrate a direct signature of anyonic statistics in FQHE systems.
- To investigate the characteristics of Hong-Ou-Mandel (HOM) interference between anyonic excitations.
Main Methods:
- Generating excitations in FQHE edge states using narrow voltage pulses at low temperatures.
- Performing HOM interference experiments on these anyonic excitations.
- Analyzing the width of the HOM dip as a function of excitation properties and thermal timescales.
Main Results:
- HOM interference between anyonic excitations shows a direct signature of their unique statistics.
- The width of the HOM dip is universally determined by the thermal timescale, independent of the wave packet width.
- This universal width is linked to the anyonic braiding of excitations with thermal fluctuations at a quantum point contact.
Conclusions:
- The study provides a feasible experimental method to detect and characterize anyonic statistics using HOM interference.
- The findings suggest that current experimental techniques, such as periodic voltage pulses, can realistically observe this effect.
- This work opens avenues for exploring quantum statistics in condensed matter systems and potential applications in quantum technologies.
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